Abstract: According to the statistics, coal and gas outburst accidents were mostly caused by the uncovering coal at home and abroad. Due to the large roadway development engineering capacity, long uncovering coal time, complex drilling construction technique and other factors, small angle long distance uncovering coal had bigger risk than the other way of uncovering coal outburst, so the small angle long distance uncovering coal was the key of outburst prevention study. The small angle long distance uncovering coal method and outburst process practice was carried out in haulage dip of the west wing of Guizhou Anshun Coal Mine, which provided the reference for the improvement of rock cross-cut uncovering coal and outburst elimination method.